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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/supervised_user/supervised_user_google_auth_navigation_throttle.h"
#include <utility>
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/notreached.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/signin/identity_manager_factory.h"
#include "chrome/browser/supervised_user/child_accounts/child_account_service_factory.h"
#include "chrome/browser/supervised_user/supervised_user_browser_utils.h"
#include "chrome/browser/supervised_user/supervised_user_verification_page_blocked_sites.h"
#include "chrome/common/webui_url_constants.h"
#include "components/google/core/common/google_util.h"
#include "components/security_interstitials/content/security_interstitial_tab_helper.h"
#include "components/signin/public/base/consent_level.h"
#include "components/signin/public/identity_manager/identity_manager.h"
#include "components/supervised_user/core/browser/child_account_service.h"
#include "components/supervised_user/core/common/features.h"
#include "content/public/browser/frame_type.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/navigation_throttle.h"
#include "content/public/browser/web_contents.h"
#if BUILDFLAG(IS_ANDROID)
#include "chrome/browser/supervised_user/child_accounts/child_account_service_android.h"
#include "components/signin/public/identity_manager/identity_manager.h"
#include "ui/android/view_android.h"
#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_WIN)
#include "chrome/browser/supervised_user/supervised_user_verification_controller_client.h"
#include "chrome/browser/supervised_user/supervised_user_verification_page.h"
#endif
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_WIN)
namespace {
bool IsYouTubeInfrastructureSubframe(content::NavigationHandle* handle) {
if (handle->GetNavigatingFrameType() != content::FrameType::kSubframe) {
return false;
}
return handle->GetURL().DomainIs("accounts.youtube.com");
}
} // namespace
#endif
// static
void SupervisedUserGoogleAuthNavigationThrottle::MaybeCreateAndAdd(
content::NavigationThrottleRegistry& registry) {
Profile* profile = Profile::FromBrowserContext(
registry.GetNavigationHandle().GetWebContents()->GetBrowserContext());
if (!profile->IsChild()) {
return;
}
registry.AddThrottle(
base::WrapUnique(new SupervisedUserGoogleAuthNavigationThrottle(
profile, registry)));
}
SupervisedUserGoogleAuthNavigationThrottle::
SupervisedUserGoogleAuthNavigationThrottle(
Profile* profile,
content::NavigationThrottleRegistry& registry)
: content::NavigationThrottle(registry),
child_account_service_(ChildAccountServiceFactory::GetForProfile(profile))
#if BUILDFLAG(IS_ANDROID)
,
has_shown_reauth_(false)
#endif
{
}
SupervisedUserGoogleAuthNavigationThrottle::
~SupervisedUserGoogleAuthNavigationThrottle() = default;
content::NavigationThrottle::ThrottleCheckResult
SupervisedUserGoogleAuthNavigationThrottle::WillStartRequest() {
return WillStartOrRedirectRequest();
}
content::NavigationThrottle::ThrottleCheckResult
SupervisedUserGoogleAuthNavigationThrottle::WillRedirectRequest() {
return WillStartOrRedirectRequest();
}
const char* SupervisedUserGoogleAuthNavigationThrottle::GetNameForLogging() {
return "SupervisedUserGoogleAuthNavigationThrottle";
}
content::NavigationThrottle::ThrottleCheckResult
SupervisedUserGoogleAuthNavigationThrottle::WillStartOrRedirectRequest() {
// We do not yet support prerendering for supervised users.
if (navigation_handle()->IsInPrerenderedMainFrame()) {
return content::NavigationThrottle::CANCEL;
}
const GURL& url = navigation_handle()->GetURL();
if (!google_util::IsGoogleSearchUrl(url) &&
!google_util::IsGoogleHomePageUrl(url) &&
!google_util::IsYoutubeDomainUrl(url, google_util::ALLOW_SUBDOMAIN,
google_util::ALLOW_NON_STANDARD_PORTS)) {
return content::NavigationThrottle::PROCEED;
}
content::NavigationThrottle::ThrottleCheckResult result = ShouldProceed();
if (result.action() == content::NavigationThrottle::DEFER) {
google_auth_state_subscription_ =
child_account_service_->ObserveGoogleAuthState(
base::BindRepeating(&SupervisedUserGoogleAuthNavigationThrottle::
OnGoogleAuthStateChanged,
base::Unretained(this)));
}
return result;
}
void SupervisedUserGoogleAuthNavigationThrottle::OnGoogleAuthStateChanged() {
content::NavigationThrottle::ThrottleCheckResult result = ShouldProceed();
switch (result.action()) {
case content::NavigationThrottle::PROCEED: {
google_auth_state_subscription_ = {};
Resume();
break;
}
case content::NavigationThrottle::CANCEL:
case content::NavigationThrottle::CANCEL_AND_IGNORE: {
CancelDeferredNavigation(result);
break;
}
case content::NavigationThrottle::DEFER: {
// Keep blocking.
break;
}
case content::NavigationThrottle::BLOCK_REQUEST:
case content::NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE:
case content::NavigationThrottle::BLOCK_RESPONSE: {
NOTREACHED();
}
}
}
content::NavigationThrottle::ThrottleCheckResult
SupervisedUserGoogleAuthNavigationThrottle::ShouldProceed() {
supervised_user::ChildAccountService::AuthState authStatus =
child_account_service_->GetGoogleAuthState();
if (authStatus ==
supervised_user::ChildAccountService::AuthState::AUTHENTICATED) {
return content::NavigationThrottle::PROCEED;
}
if (authStatus == supervised_user::ChildAccountService::AuthState::
TRANSIENT_MOVING_TO_AUTHENTICATED) {
return content::NavigationThrottle::DEFER;
}
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_WIN)
// When an unauthenticated supervised user tries to access YouTube, we force
// re-authentication with an interstitial so that YouTube can be subject to
// content restrictions. This interstitial is only available on Desktop
// platforms as ChromeOS and Android have different re-auth mechanisms.
//
// Other Google-owned sites either already requires authentication (e.g.
// Google Photos), or have restrictions forced (e.g. SafeSearch).
GURL request_url = navigation_handle()->GetURL();
if (!google_util::IsYoutubeDomainUrl(request_url,
google_util::ALLOW_SUBDOMAIN,
google_util::ALLOW_NON_STANDARD_PORTS) ||
!SupervisedUserVerificationPage::ShouldShowPage(
*child_account_service_)) {
// This interstitial should only be displayed for YouTube request.
return content::NavigationThrottle::PROCEED;
}
if (IsYouTubeInfrastructureSubframe(navigation_handle())) {
// Controls integration between google.com and youtube.com.
return content::NavigationThrottle::PROCEED;
}
// We only show the interstitial for the primary main frame and subframes.
// Navigation is allowed otherwise;
switch (navigation_handle()->GetNavigatingFrameType()) {
case content::FrameType::kSubframe:
case content::FrameType::kPrimaryMainFrame:
break;
case content::FrameType::kFencedFrameRoot:
case content::FrameType::kPrerenderMainFrame:
return content::NavigationThrottle::PROCEED;
default:
NOTREACHED();
}
// Cancel the navigation and show the re-authentication page.
std::string interstitial_html =
supervised_user::CreateReauthenticationInterstitialForYouTube(
*navigation_handle());
return content::NavigationThrottle::ThrottleCheckResult(
content::NavigationThrottle::CANCEL, net::ERR_BLOCKED_BY_CLIENT,
std::move(interstitial_html));
#elif BUILDFLAG(IS_CHROMEOS)
// A credentials re-mint is already underway when we reach here (Mirror
// account reconciliation). Nothing to do here except block the navigation
// while re-minting is underway.
return content::NavigationThrottle::DEFER;
#elif BUILDFLAG(IS_ANDROID)
// TODO(crbug.com/375383826): Improve / verify coverage of the code below.
if (!has_shown_reauth_) {
has_shown_reauth_ = true;
content::WebContents* web_contents = navigation_handle()->GetWebContents();
if (!web_contents->GetNativeView()->GetWindowAndroid()) {
return content::NavigationThrottle::CANCEL_AND_IGNORE;
}
Profile* profile =
Profile::FromBrowserContext(web_contents->GetBrowserContext());
signin::IdentityManager* identity_manager =
IdentityManagerFactory::GetForProfile(profile);
// This class doesn't care about browser sync consent.
CoreAccountInfo account_info =
identity_manager->GetPrimaryAccountInfo(signin::ConsentLevel::kSignin);
if (account_info.IsEmpty()) {
// No primary account (can happen when it was removed from the device).
return content::NavigationThrottle::DEFER;
}
if (skip_jni_call_for_testing_) {
// Returns callback without JNI call for testing. Resets
// has_shown_reauth_.
base::BindRepeating(
&SupervisedUserGoogleAuthNavigationThrottle::OnReauthenticationFailed,
weak_ptr_factory_.GetWeakPtr())
.Run();
} else {
ReauthenticateChildAccount(
web_contents, account_info.email,
base::BindRepeating(&SupervisedUserGoogleAuthNavigationThrottle::
OnReauthenticationFailed,
weak_ptr_factory_.GetWeakPtr()));
}
}
return content::NavigationThrottle::DEFER;
#else
#error Unsupported platform
#endif
}
void SupervisedUserGoogleAuthNavigationThrottle::OnReauthenticationFailed() {
// Cancel the navigation if reauthentication failed.
CancelDeferredNavigation(content::NavigationThrottle::CANCEL_AND_IGNORE);
}
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